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(No Model.)

- 3 Sheets-Sheet 1. S. BURTON. AUTOMATIC BOBBIN WINDER FOR SEWING MACHINES. No. 575,587.

Patented Jan. 19, 1897.

(No Model.) 3 sheet -sneer. 2.

S. BURTON. AUTOMATIC BOBBIN WINDBR FOR SEWING MACHINES.

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S. BORT ON. I AUTOMATIC BOBBIN WINDER FOR SEWING MAGHINES.

I Patented Jan. 19, 1897.

#Qbvasaas/ ".UNITED STATES PATENT OFFICE.

STOCKTON BORTON, OF PROVIDENCE, RHODE ISLAND, ASSIGNOR TO THE IVILLOOX & GIBBS SEWING MACHINE COMPANY, OF NEWV YORK, N. Y.

AUTOMATIC BOBBlN-WINDER FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent N 0. 575,587 dated January 19, 1897. Application filed September 11, 1895- Serial No. 562,152. (No model.)

T at whom it-may concern.- stand is mounted the tension '1, of any suit- Be it known that I, STOCKTON BORTON, of able construction, and the thread-guide T, Providence, Rhode Island, have invented a through which the thread i is led, as indinew and useful Improvement in Automatic cated in Fig. 1. 55 Bobbin-Winders for Sewing-Machines, Which In Fig. 5 the winder is shown mounted upon is fully set forth in the following specification. the upright standard A of a sewing-machine This invention relates to devices for windand driven from a pulley O on the main shaft ing thread upon the bobbins used in lockthereof. stitch sewing-machines, such devices being The winder has a shaft 0, j ournaled in bear- 6o 10 commonly known as bobbin-winders. ings in the casing B. It projects beyond said One of the principal objects of the invencasing at both ends, carrying on one end a tion is to provide an appliance which will pulley c and near the other a disk 0 fast perform the desired work without care or aton the shaft. Athumb-nut c havingamilled tention on the part of the operator, who, after periphery, is formed integral with the pulley 15 setting it in operation, may leave it to con- 0 whereby the shaft may be held stationary tinue the winding until the bobbin is full, while turning the clamping-nut d. The exwhen the thread will be automatically cut oif. tremity of the shaft 0 beyond the disk a and The winder hereinafter described has a selfover which the bobbin cl slides until it comes threading guide, thereby further reducing the in contact with said disk, is somewhat reduced 2o amount of attention required from the operin diameter and is partially screw-threaded ator. The winder may be conveniently atfor engagement of the thumb-nut cl. Betached to the arm of a sewing-machine, but tween the latter and the bobbin is interposed in factories it is more convenient to have the the clamping-disk e, shown as made in one bobbins filled by a special operator and suppiece with nut 61. A Worm f is cut 011 that 25 plied to the sewing-machine operators. part of shaft 0 lying within the casing B for To this end the invention embraces a spea portion of its length, for purposes hereincial stand upon which the winder may be after referred to.

n1ounted,said stand beingprovided withaten- The mechanism for feeding the thread to sion and guide for the driving-belt, adapted the bobbin consists mainly of a sliding guide- 30 to be run from a sewing-machine motor. rod g, lying parallel with the shaft 0, and pro- The invention can most conveniently be 6X- jecting through an opening in the casing B plained in connection with the accompanying alongside of the bobbin. The other end of drawings, in whichslide 9 is hollowed out and incloses a coiled Figure 1 represents the bobbin-Winder and spring g Whose pressure moves the slide g 35 stand in side elevation. Fig. 2 is an elevatothe left, motionin the opposite direction betion of the winder and part of the stand from in gimparted bymeans hereinafter described. the side opposite Fig. 1. Fig. 3 is avertical The other or projecting end of the rod is transverse section, partly in elevation. Fig. recessed or cut away at h. This recess has 4 is a section through the axes of the guidea vertical and a horizontal side, and looking 4o rod and bobbin-spindle in perspective, lookat the end of the rod approximates a quading obliquely in the direction of the arrow, rant in shape. Beneath this recess is left a Fig. 3. Fig. 5isafront elevation of thewinder lug h, which is inclined in both directions mounted on the arm of a sewing-machine, from its point. The end of rod 9 is also inand Fig. 6 illustrates the guide-rod detached. clined,forming with the face of lug ha guide- 9 5 5 The stand S is an upright casting provided surface it oblique to the aXis of the rod. The with a base S. A short vertical wall S risupper part of the end of the rod is rounded, ing from the latter, carriesa horizontal flange as shown at 71 Fig. 4. Surface h is inter S which is slotted to form a guide for the sected by a cut h constituting an inlet for driving-belt s. The casing B of the winder the thread to the thread guide or eye h in lug too 50 is attached to the face of the stand by screws h. hen the thread is connected to the 19, passing through ears I). At the top of the bobbin and the latter begins to rotate, the

thread, on being tightened, slides along the inclined surface 7L and is drawn into the thread-eye 71. As already stated, the guide rod or slide 1 is moved in one direction by spring Movement in the opposite direction is imparted to it by a heart-shaped cam t, mounted on worinwheel 1", carried on pin 17 journaled in an obliquely-inclined par tition a of casing 13, and rotated by engagement with the worm f on the shaft 0. Slide 9 within the casing l is cut-away for a portion of its length, as at L, and against the flat face of the cut-away portion is located a friction-roller 7;, with which the cam imakes contact.

In order that a bobbin may be placed in the winder and the thread wound thereon during the ordinary running of the machine, and without special attention from the operator to note when the bobbin is full, means are provided for automatically cutting the thread at the proper time. Such means con sists of a bell-crank lever L,pivoted on the side of the casing 13 by a screw Z, the lower arm Z of said lever being flattened at Z for making contact with the thread as it is wound on the bobbin, and the upper arm Z carrying a hammer or cutter Z. The arm Z during the winding presses upon the thread nearly the entire width of the bobbin, insuring compactness and the even laying of the threads. The bell-crank lever L is actuated by a U- shaped spring on, pivoted at one end m to the frame 13 and at the other m to arm Z, tending to press the lever in either direction according to its position. When the parts are in the position shown in Figs. 2 and :t, the pressure of spring on is exerted to keep outter l in its raised position; but when the lever has so far tilted that the point 122 where the spring is connected to the lever passes a line drawn through the axis of the lever and point m (which position it has nearly reached in Fig. 2) the direction of pressure of the spring on the lever is reversed, by a principle well understood, and the lever will be suddenly snapped to the position shown in dotted lines, Fig. 2. The edge of the cutter Z is broader than the bobbin, so that in any position of sliding guide g it will act upon the thread when tripped. In descending, the cutter severs the thread against the vertical face of recess h in the guide-rod. The edge of the hammer is quite dull, and it acts by crushing or breaking rather than by cutting the thread. Being dull, the edge does not cut into the anvil or thread-guide, and sharpening is never required,as in the case of sharpedged cutters.

The bobbin-winder herein described operates as follows: The bobbin (1 having been secured in place by manipulating the thumbnut d, the thread is led thereto over the extremity of the slide g, which is self-threading, the thread sliding down or up the inclined end thereof to the slot 71/2, from which it slides into the opening h It is only necessary to put the bobbin in place, connect the first end of the thread therewith, and start the machine. As soon as the bobbin begins to pull on the thread the latter is drawn automatically by the baelcand-forth movement of slide g into the eye 7t. As the bobbin isrotated the wormthreadf rotates the Worm-Wheel i, from which motion in one direction is transmitted through the heart-shaped cam 'i and friction-roller It to the slide g, said slide being moved in the opposite direction by the spring By the action of slide 9 the thread is guided and evenly wound in layers upon the bobbin. It is apparent that the spring could be dispensed with and a positive movement in both directions be imparted to the slide, if desired. During the winding of the bobbin the arm Z of bell-crank lever L is pressed against the thread wound on bobbin (1 by the U-shaped spring m the said lever being gradually tilted by the accumulation of thread on the bobbin until the bobbin is filled to the periphery of its side disks, at which instant the lever has been so far tilted that the shifting of the relative positions of the pivot-points of the spring causes areversal of the pressure of the latter, causing the sudden descent of the cutter Z upon the thread, as it lies against the slide g, with sufficient force to sever the same just above the eye it.

It is obvious that modifications could be made in the construction of the various parts herein described and illustrated in the accompan yin g drawings without departing from the spirit of the invention.

Having thus particularly described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a bobbin-Winder,the combination with the bobbin-shaft, of a guide-rod having its end beveled or cut across at an oblique angle to the axis of the rod and provided with a threadeye near the beveled surface and with a cut or thread-inlet from said surface to said eye, and means for imparting a reciprocating movement from said shaft to said rod, substantially as described.

2. In abobbin-winder,the combination with the bobbin-shaft, of a guide-rod recessed or cut away at its end, a lug on the rod beneath the recess, the end of the rod and lug being beveled or cut across at an oblique angle to the axis of the rod, and the lug being provided with a thread-eye and a cut or thread-inlet from the beveled surface to said eye, and means for imparting a reciprocating movement from said shaft to said rod, substantially as described.

3. In a bobbin-Winder,the combination with the bobbin spindle, of a threadguide, a thread-severing device, a spring for actuating the same connected at one end to said device and at the other to a stationary part, and means actuated by the full bobbin to reverse the position of the spring and cause the descent of the thread-severing device upon the thread, substantially as described.

4. In a bobbin-winder, the combination of the bobbin-spindle means for holding a bobbin thereon, a guide-rod, a two-arm lever, a spring normally pressing one arm of said lever against the thread as it is Wound on the bobbin, and a hammer carried by the other arm of the lever, said spring being connected at its respective ends to the lever and to a stationary part, so that as the lever is tilted by the accumulation of thread on the bobbin, the pressure of the spring is at a predetermined point reversed, causing the descent of the hammer to sever the thread against the guide-rod, substantially as described.

5. In a bobbin-Winder, the combination of the bobbin-spindle the guide-rod means for reciprocating the same, the automatic cutter and means actuated by the accumulation of thread on the bobbin for causing the descent of said cutter, to sever the thread against the side of the guide-rod, substantially as described.

6. In a bobbin-Winder,tlie combination with the bobbin-spindle, of the thread-guide, the thread-severing device in the form of a 11ammer, and means actuated by the full bobbin for causing the descent of the hammer upon the thread-guide to sever the thread substantially as described.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

STOCKTON HORTON.

IVitnesses:

J. PARMLY, E. A. RACE. 

